I have the same, 89' olds cutlass
ciera v6. Currently running 84k miles
strong. Did a partial tune-up at 75k
miles..(radiator flush, transmission
flush, plugs,) need to get new plug
wires and power cores possibly...
has a new alternator and starter. As
well as AC compressor. But my
heater core is blown, bypassed at the
moment. But winter is approaching
and nervous about all that....
Starter or clean your fuel injectors. I
don't know what they use, I know it's
not an exact injection, but when you
run the additive in your gas it will
really bring it up a notch.. as well as
using 91. shell or chevron every now
and then.